1 Department of Periodontology in the College of Dentistry at the University of Tennessee Health Science Center, Memphis, Tennessee, USA.
2 Instructional Consultant in the Teaching and Learning Center at the University of Tennessee Health Science Center, Memphis, Tennessee, USA.
3 Department of Clinical and Extramural Affairs, College of Dentistry, and an Associate Professor in the Department of Periodontology at the University of Tennessee Health Science Center, Memphis, Tennessee, USA.